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graphqlgraphql-java

Overriding standard ID scalar

I want to use UUID as an identifier but standard scalar ID is coerced as string. So have to parse uuid from string everywhere I use ID type.

I wonder is it possible to override ID type with my own implementation? This scalar type has some special meaning or I can just use my own scalar called UUID as identifier?

Solution

  • We can not override the available scalers, please refer this link for discussion.

    You can define a UUIDScalar in your code, for the same you will have to override the following methods

    @Override
public Object serialize(Object dataFetcherResult) {
    //
}

@Override
public Object parseValue(Object input) {
    //
}

@Override
public Object parseLiteral(Object input) {
    //
}

    Reference: Making custom scalars in graphql java

    Luckily the code for making custom scalar for UUID is available online, you can use this PR